<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2223-4861</journal-id>
<journal-title><![CDATA[Centro Azúcar]]></journal-title>
<abbrev-journal-title><![CDATA[cen. az.]]></abbrev-journal-title>
<issn>2223-4861</issn>
<publisher>
<publisher-name><![CDATA[Editorial Feijóo]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2223-48612021000300053</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[DESACETILACIÓN DE QUITINA OBTENIDA POR VÍA QUÍMICA DE EXOESQUELETOS DE CAMARÓN LITOPENAEUS VANNAMEI]]></article-title>
<article-title xml:lang="en"><![CDATA[DEACETYLATION OF OBTAINED CHITIN FROM LITOPENAEUS VANNAMEI EXOSKELETON SHRIMP BY CHEMICAL MEANS]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Curbelo Hernández]]></surname>
<given-names><![CDATA[Caridad]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Palacio Dubois]]></surname>
<given-names><![CDATA[Yadira]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fanego Hernández]]></surname>
<given-names><![CDATA[Sandra]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Tecnológica de La Habana &#8220;José Antonio Echeverría&#8221;, CUJAE Facultad de Ingeniería Química ]]></institution>
<addr-line><![CDATA[Marianao La Habana]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Laboratorio de Analítica (ICIDCA)  ]]></institution>
<addr-line><![CDATA[San Miguel del Padrón La Habana]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2021</year>
</pub-date>
<volume>48</volume>
<numero>3</numero>
<fpage>53</fpage>
<lpage>61</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2223-48612021000300053&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2223-48612021000300053&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2223-48612021000300053&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Introducción: Actualmente, la especie que se cultiva en Cuba es el camarón blanco del Pacífico Litopenaeus vannamei, por su rápida reproducción y conversión de alimentos. En su procesamiento se generan grandes cantidades de residuos que pueden ser aprovechados para la obtención de productos de valor comercial, con lo cual disminuye el impacto ambiental de esta industria.  Objetivo: Evaluar la etapa de desacetilación de la quitina obtenida experimentalmente del exoesqueleto de camarón Litopenaeus vannamei por vía química.  Materiales y Métodos: La quitina utilizada se obtuvo del exoesqueleto de camarón Litopenaeus vannamei, y fue desacetilada con una solución de NaOH a 10 mol/L, en una relación sólido-líquido 1:4 (p/v), a 80 ºC, 250 min-1, durante dos horas. Se calcularon los grados de acetilación (DA) y desacetilación (DD) según Khan y col., (2002). Se realizó la prueba de la solubilidad del quitosano según Barra y col., (2012). Se determinaron los espectros infrarrojos de la quitina de partida y la desacetilada en un equipo FTIR con aditamento ATR.  Resultados y Discusión: El grado de desacetilación para la quitina fue similar al del quitosano debido a una insuficiente desproteinización de la quitina, lo cual fue corroborado por la prueba de solubilidad del quitosano que arrojó una baja calidad. Los espectros IR de la quitina y el quitosano fueron similares.  Conclusiones: La desproteinización de la quitina influyó en su calidad, y también en su desacetilación. Debe garantizarse trabajar a temperaturas cercanas a los 100 °C para lograr un quitosano de buena calidad.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Introduction: Currently, the specie that is cultivated in Cuba is the Pacific white shrimp (Litopenaeus vannamei), due to its rapid reproduction and food conversion and is mainly used for export. In its processing, large amounts of waste are generated that can be used for obtaining products of commercial value, thereby reducing the environmental impact of this industry.  Objective: To evaluate the deacetylation stage of chitin obtained experimentally from the Litopenaeus vannamei shrimp exoskeleton by chemical means.  Materials and Methods: The chitin was obtained from the Litopenaeus vannamei shrimp exoskeleton, it was deacetylated with a NaOH solution at 10 mol/L, in a solid-liquid ratio 1: 4 (p / v), at 80 ºC, 250 min-1, for two hours. The degrees of acetylation (DA) and deacetylation (DD) were calculated according to Khan et al., (2002). The test of the solubility of chitosan was also carried out according to Barra et al., (2012). The infrared spectra of chitin and chitosan were determined with FTIR equipment with ATR attachment.  Results and Discussion: The degree of deacetylation for chitin was similar to that for chitosan, due to the effect of insufficient deproteinization of chitin. This was corroborated by the chitosan solubility test which showed a low quality. The IR spectra of chitin and chitosan were similar.  Conclusions: The deproteinization of chitin influenced in the quality, and therefore, in its deacetylation. It must be guaranteed to work at temperatures close to 100 °C to achieve a good quality chitosan.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[camarón]]></kwd>
<kwd lng="es"><![CDATA[desacetilación]]></kwd>
<kwd lng="es"><![CDATA[exoesqueleto]]></kwd>
<kwd lng="es"><![CDATA[quitina]]></kwd>
<kwd lng="es"><![CDATA[quitosano]]></kwd>
<kwd lng="en"><![CDATA[chitin]]></kwd>
<kwd lng="en"><![CDATA[chitosan]]></kwd>
<kwd lng="en"><![CDATA[deacetylation]]></kwd>
<kwd lng="en"><![CDATA[exoskeleton]]></kwd>
<kwd lng="en"><![CDATA[shrimp]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Arachchi]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Ismail]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Gunawardena]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Degree of deacetylation of chitin in Sri Lankan prawn shells (Penaeus semisulcatus) under different treatment methods]]></article-title>
<source><![CDATA[International Journal of Engineering and Science (IJES)]]></source>
<year>2018</year>
<volume>7</volume>
<numero>10</numero>
<issue>10</issue>
<page-range>53-61</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Atanda]]></surname>
<given-names><![CDATA[S.A.]]></given-names>
</name>
<name>
<surname><![CDATA[Agboola]]></surname>
<given-names><![CDATA[A.A.]]></given-names>
</name>
<name>
<surname><![CDATA[Udefi]]></surname>
<given-names><![CDATA[I.O.]]></given-names>
</name>
<name>
<surname><![CDATA[Fapohunda]]></surname>
<given-names><![CDATA[T.B.]]></given-names>
</name>
<name>
<surname><![CDATA[Nnamani]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of Chemical Treatment on the Degree of Deacetylation of Chitosan]]></article-title>
<source><![CDATA[Nanomedicine &amp; Nanotechnology]]></source>
<year>2016</year>
<volume>1</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>1-6</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Barra]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Romero]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Beltramino]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Obtención de quitosano]]></source>
<year>2012</year>
<publisher-name><![CDATA[Sitio Argentino de Producción Animal]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cadeza]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Estudio de factibilidad para la implementación de una red de valor de quitosano extraído de Penaeus vannamei]]></source>
<year>2014</year>
<publisher-loc><![CDATA[España ]]></publisher-loc>
<publisher-name><![CDATA[Universidad de Cádiz]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cárdenas]]></surname>
<given-names><![CDATA[O.E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Caracterización de los productos de la desacetilación de la quitina]]></source>
<year>2010</year>
<publisher-loc><![CDATA[El Salvador ]]></publisher-loc>
<publisher-name><![CDATA[Universidad de El Salvador]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Escobar]]></surname>
<given-names><![CDATA[D.M.]]></given-names>
</name>
<name>
<surname><![CDATA[Castro]]></surname>
<given-names><![CDATA[A.M.]]></given-names>
</name>
<name>
<surname><![CDATA[Vergara]]></surname>
<given-names><![CDATA[N.A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Determinación de la relación entre el porcentaje del grupo amino y el grado de desacetilación del quitosano]]></article-title>
<source><![CDATA[Revista de Ciencias]]></source>
<year>2015</year>
<volume>18</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>73-88</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[González]]></surname>
<given-names><![CDATA[P.G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Diseño de una planta de extracción de quitina a partir de residuos de camarón por vía enzimática]]></source>
<year>2017</year>
<publisher-loc><![CDATA[Cuba ]]></publisher-loc>
<publisher-name><![CDATA[Universidad Tecnológica de La Habana]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Khan]]></surname>
<given-names><![CDATA[T.A.]]></given-names>
</name>
<name>
<surname><![CDATA[Peh]]></surname>
<given-names><![CDATA[K.K.]]></given-names>
</name>
<name>
<surname><![CDATA[Ch&#8217;ng]]></surname>
<given-names><![CDATA[H.S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Reporting degree of deacetylation values of chitosan: the influence of analytical methods]]></article-title>
<source><![CDATA[J. Pharm Pharmaceut Sci]]></source>
<year>2002</year>
<volume>5</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>205-12</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Khoushab]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Yamabhai]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Chitin research revisited]]></article-title>
<source><![CDATA[Marine drugs]]></source>
<year>2010</year>
<volume>8</volume>
<numero>7</numero>
<issue>7</issue>
<page-range>1988-2012</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Laffita]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Diseño de una planta de producción de quitosano y otros productos a partir de residuos de camarón]]></source>
<year>2015</year>
<publisher-loc><![CDATA[Cuba ]]></publisher-loc>
<publisher-name><![CDATA[Universidad Tecnológica de La Habana &#8220;José Antonio Echeverría&#8221;]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[López]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Correa]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Bioadsorción de iones Fe (II) y colorante Rojo Allura usando quitosano entrecruzado]]></article-title>
<source><![CDATA[La sociedad académica]]></source>
<year>2012</year>
<numero>39</numero>
<issue>39</issue>
<page-range>15-23</page-range></nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mármol]]></surname>
<given-names><![CDATA[Z.]]></given-names>
</name>
<name>
<surname><![CDATA[Gutiérrez]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Páez]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Ferrer]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Rincón]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Desacetilación termoalcalina de quitina de conchas de camarón]]></article-title>
<source><![CDATA[Multiciencias]]></source>
<year>2004</year>
<volume>4</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>1-10</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mármol]]></surname>
<given-names><![CDATA[Z.]]></given-names>
</name>
<name>
<surname><![CDATA[Páez]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Rincón]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Araujo]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Aiello]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Chandler]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Quitina y Quitosano polímeros amigables. Una revisión de sus aplicaciones]]></article-title>
<source><![CDATA[Revista Tecnocientífica URU]]></source>
<year>2013</year>
<numero>1</numero>
<issue>1</issue>
<page-range>53-8</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Muslih]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Ayu]]></surname>
<given-names><![CDATA[S.A.]]></given-names>
</name>
<name>
<surname><![CDATA[Harisuddin]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[doi.org/10.1063/1.4978144]]></article-title>
<source><![CDATA[Comparison of green method for chitin deacetylation]]></source>
<year>2017</year>
<conf-name><![CDATA[ AIP Conference Proceedings, 1823]]></conf-name>
<conf-loc> </conf-loc>
<page-range>0200710-1- 020071-6</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ortiz]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Tratamiento químico y biotecnológico de residuos de camarón para la obtención de productos de valor agregado]]></source>
<year>2013</year>
<page-range>1-63</page-range><publisher-loc><![CDATA[México ]]></publisher-loc>
<publisher-name><![CDATA[Universidad Veracruzana Xalapa]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Palacio]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
</person-group>
<source><![CDATA[Influencia de las condiciones de despigmentación y desmineralización en la obtención de quitina y quitosano]]></source>
<year>2017</year>
<publisher-loc><![CDATA[Cuba ]]></publisher-loc>
<publisher-name><![CDATA[Universidad Tecnológica de La Habana]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Perera]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Promoción del desarrollo empresarial. Tecnología y Financiamiento: el cultivo del camarón en Cuba]]></source>
<year>2006</year>
<conf-name><![CDATA[ 36Asamblea General de ALIDE]]></conf-name>
<conf-loc> </conf-loc>
</nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pérez]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Ruiz]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Vilas]]></surname>
<given-names><![CDATA[J.L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Determining the deacetylation degree of Chitosan: Opportunities to learn instrumental techniques]]></article-title>
<source><![CDATA[Journal of Chemical Education]]></source>
<year>2018</year>
<volume>95</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>1022-8</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Polo]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Sostenibilidad: obtención de quitina a partir de sustancias de desecho]]></source>
<year>2016</year>
<publisher-loc><![CDATA[España ]]></publisher-loc>
<publisher-name><![CDATA[Universidad de Sevilla]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Simionatto]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Gomes]]></surname>
<given-names><![CDATA[E.T.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The use of DSC curves to determine the acetylation degree of chitin/chitosan samples]]></article-title>
<source><![CDATA[Thermochimica Acta]]></source>
<year>2006</year>
<volume>444</volume>
<page-range>128-33</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
